比如以下这个回归
Source | SS df MS Number of obs = 7210
-------------+------------------------------ F( 1, 7208) = 1.17
Model | 18.5393531 1 18.5393531 Prob > F = 0.2795
Residual | 114247.897 7208 15.8501522 R-squared = 0.0002
-------------+------------------------------ Adj R-squared = 0.0000
Total | 114266.436 7209 15.8505252 Root MSE = 3.9812
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e | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
part | -.1267709 .1172166 -1.08 0.280 -.3565498 .103008
_cons | .7528784 .0524209 14.36 0.000 .6501182 .8556387
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我想把part的coef提取出来,保存到另一个数据文件中